Card-writing platen for type-writing machines.



C. GABBIELSON. CARD WRITING PLATEN FOR TYPE WRITING MACHINES.

APPLICATION HLED FEB. 3 I914.

Patented Nov. 16, 1915.

2 SHEETS-SHEET I.

lllllllllllllill I I III" II I IIIImIImnI I abbot/"e1 a C, GABHIELSON. CARD WRITING PLATEN FOR TYPE WRH'ING MACHINES.

APPLICATION HLED FEB. 3. 1914.

Patented Nov; 36, 1915.

2 SHEETS-SHEET 2- m M Q m M, a

UNITED STATES PATENT OFFICE.

cam. GABRIELSON, or SYRACUSE, new YORK, ASSIGNOR TO L. c. smrrn & BROS. v TYPEWBITER COMPANY, or smtiiousn, NEW YORK, A CORPORATION or new YORK.

Specification of Letters ?atent.

Patented Nov. 1e, leis.

Application filed February 3, 1914. Serial No. 816,257.

To all whom it may concern Be it'known that I, CARL Gannmn'sox, a

citizen of the United States, and resident of Syracuse, county of Onondaga, State of v. New York, have invented certain new and useful Improvements in Card-\Vriting Platens for Type-Writing 'Machines, of

which the following is a specification.

. Thisinvention relates to card holding and feeding devices for typewriting machines and particularly to means for holding and feeding' stencil cards, such as' are used in addressing machines.

The invention will be described in connection with the accompanying drawing, in which,

Figure 1 is a front view of a typewriter platenand attachments embodying the invention; Fig. 2 is a partial front view, the

platen proper and the card holder being removed; Fig; 3 is a sectional view on the line 3-3 of Fig. 1, illustrating the ribbon feeding mechanism; Fig. 4 is a" transverse section onthe line-M of a rear view of the card holder; Fig. ,6 1s a rear 'uiew'of the platen in perspective; Fig.

is a view of one-of the side frames of the device; Fig. 8 is a perspective view of the lever which carries the ribbon reversing pinions, and F ig'. 9 is a-view of the platen ratchet. V

Referring to the drawing. 1Q indicates, a platen shaft which is adapted to be received .in the platen bearings of a standard typewriting machine and 11 indicates the usual ratchet wheel, fast on the shaft, for-rotating the platen step by step. In the present instance a segmental platen 12 is secured on the shaft 10 by suitable set screws. This platen is preferably provided on its face with clips 13 for holdingacelluloid plate 14 to provide a suitable and renewable writing surface. The celluloid plate can be removed and another one sprung into place when it is desired to renew the writing surface.

The card holder comprises a U-shaped plate consisting in end pieces 15 and a crOSs connecting piece-16, together with sprin clips 17, which are secured on the back 0? the end pieces 15 and cooperate with said .end piecesto hold the ends of the cards.

.The springclips 17 are spaced from the end plates 15 so asto receive the cardsand they Fig. 1; Fig. is

are bentinward slightly at 18 to retain the cards in printing position. The lower edge of the card holder is provided with a slight flange if) adapted tsustain a card in the holder. The card holders are movable up and down. theends being guided in grooves 20 in the fixed end plates of a supporting frame which will be presently described. The card holder is sustained and moved by projections 21 which engage slots in arms 22 which are rigidly connected to the platen or platen shaft at each end of the platen.

Supported on the platen shaft is a frame comprising end. plates 23 which are rigidly connected together by a rod 25% and a curved plate This frame is prevented from turning on the platen shaft by engagement \vith'scime fixed'portion of the typewriting' machine; such as the bar 26. i A ribbon spool 27 is removably supported 5 by theend plates 23 the fixed frame. As

Shown in Fig. 2, the ribbon spool has a fixed bearing 28 anda' laterally removable bearing 29 which can be withdrawn against the tension of a spring 30 to permit the spool to be removed. The spring plunger carrying the bearing 29-is provided with a knob 31 by means of which the spool may be turned. the bearing 29 being adapted to carry the spool with it when revolved. The spool 27 is provided with a gear 32 which is automatically turned to feed the ribbon in one direction when the platen is moved to space between lines, as will be hereinafter explained.

A second ribbon spool is mounted on the platen shaft within the platen and is free to rotate independently of the platen and shaft. This spool is provided with a gear 34 by means of which it may be autoplained.

matically rotated, as will be presently exgear 36- and apinion' 37. The gear 36 is in mesh with a gear 38 which is mounted on the platen shaft with freedom to revolve independently thereof. The gear 38 is moved upward by means of a pawl 39 when the platen shaft is turned to feed the card holder upward. the pawl 39 being pivoted on one of the arms 22 Which carry the card holder. The gear 38 is prevented from moving backward by means of a holdin pawl 40. carried by one of the end plates 23. It will thus be seen that each time the card holder is moved to space between lines the gears 38 and 36 and the pinion 37 will be moved.

The pinion 37 is in mesh with a pinion ell which, in turn, meshes with a pinion 42, both pinions being carried by an arm of a U- shaped lever 43 which is pivotally mounted on the rod Q-l. The lever 43 is provided with a handle 43 by means of which it can be shifted to throw the pinion l1 into engagement with the gear of the lower spool 33 or the pinion 42 into engagement with the gear of the upper spool 27. The spools may thus be drivenautomatically and successively in opposite directions whereby the ribbon is wound back and forth over the printing point. The lever 43 is'provided with a spring catch 44 which cooperates with depressions or openings -15 in the adjacent plate 23 to hold the lever l3 in either of its operative positions, for positively feeding either spool. v

The ribbon '50 extends from the upper 'spool down over the face of the platen and thence 'undera roller 51 and up onto the spool 33, which is mounted on the platen shaft; i

As is well known, stencil cards are made by impactof the type directly upon the stencil material and not through 'a ribbon, as in ordinary typewritin'g. 'It is desirable to be able to read the stencil impressions readily, however, and for thisreason the ribbon is provided between the stenciland the platen so that an impression will be made on the back of the stencil without affecting the cutting or crushing efl'ect of the bare type upon the stencil card. As but two or three lines are i usually written on a card it is only necessary Lent is,

to move theplaten shaft back and forth through a small arc and to prevent the platen being moved too'far in either direction, and also for the purpose of quickly and accurately locating the first or top line on the stencil card, I provide stops which are fast on the platen shaft adjacent to the ratchet wheel 11 and which cooperate with the usual holding pawl 53 at the back of the ratchet wheel.

Having described my invention what I claim and desire to secure by Letters Pat- 1. In a typ'ewriting machine, the combination with. a'platen shaft, of a hollow segmental platen mounted on said shaft, a ribbon spool upon the shaft within the platen, and means for turning the spool to feed the ribbon, said means being operated from the shaft by the turning movement thereof.

2. In a typewriting machine, the combina- I tion with a platen shaft, of a hollow.seg-' mental platen mounted on said shaft, a ribbon spool upon the shaft within the platen,

In a typewriting machine, the combination with a hollow segmental platen, of a ribbon spool within the platen, a second rib- .bon spool external to the platen, means for guiding the ribbon from one spool to the other over the face of the platen, and means for automaticallyturning said spools, alter- -nately, to feed the ribbon back .and forth over the face of the platen.

4. In a typewriting machine, the combination with a platen shaft, of a hollow seg-v mental platen thereon, a card holder movable with the platen and adapted to hold a card adjacent to the printingpoint thereon,

and means for feeding the ribbon between the card and the platen.

5. In a typewriting machine, the combi nation with a hollow segmental platen, of a ribbon spool within the platen, a second ribbon spool external to the platen, a card holding device movable with the platen, and

means vforguiding the ribbon between said i card holding device and the face of the platen.

(3. In a typewriting machine, the combina-, tion with a. platen and a card holder movable with the platen, oftwo ribbon spools, means for automatically turning. the spools, alternately, and means for guidingthe ribbon between said card holder'ahd the faceof the platen.

7. In a typewriting machine, the combina tion with a hollow segmental platen, a ribbon spool within the platen, means movable with the platen for turning the ribbon spool in one direction, means for limiting the oscillating movement of the 'platen,.and a card holder supported adjacent the face of the platen and movable with the platen.

' 8. In a typew iting machine, the combination with a platen sliaft, of asegmental platen thereon, a card holder adjacent the platen and movable therewith, a ribbon spool 'within'the platen, a ribbon spool external to the platen, and a train of gearing adapted to be connected to rotate said spools alternately, said gearing being driven in one;

direction bymeans movable with the platen and said ribbon passing between, the card holder and platen:

In testimony whereof I atlix my signature in presence of two witnesses. CARL GABRIELSON,

IVitnesses:

WILLIS J Hommoon, CHAS. F. PARSONS. 

